--- a/tools/fiptool/fiptool.c
+++ b/tools/fiptool/fiptool.c
@@ -3,7 +3,7 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
-
+#define _DARWIN_C_SOURCE
 #ifndef _MSC_VER
 #include <sys/mount.h>
 #endif
@@ -18,6 +18,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
+
+#define uuid_t fiptool_uuid_t
 
 #include "fiptool.h"
 #include "tbbr_config.h"